Abstract: To enhance the management of QHD32-6 oilfield electric pump wells and predict effectively the probability of faults of electric pump units, fuzzy comprehensive judgment method is applied to establish the element set, weight set and judgment set of faults of electric pump units, to provide the calculation method of risk coefficient of influencing factor and criterion of risk evaluation level of single well and to establish the fault prediction model of electric pump units. This method can predict the wells with high fault probability of operating electric pump unit. The actual application shows that the accuracy of application of this method in fault probability prediction of units was 77.78 % in the first half of 2013 and accumulative production loss saved is 7,075 m3. The predict accuracy of this method can meet the demand for engineering and technical analysis to provide technical support for optimized management of electric pump.